Black timber bark beetle (Xylosandrus germanus) is considered as a vector of various diseases. By living in symbiosis with fungi, like any ambrosia beetle, he carries fungi with him. These fungi are symbiotic for the imago and they form a component of his food, but they can be pathogenic for the host. It is most often associated with the fungus Ambrosiella hartigii, but it is also known to have a symbiotic occurrence with Ceratocystis ulmi, Fusarium sp. and Ophiostoma sp. Based on the capture of images in the field and their subsequent classification into imagos, which we used to compare breeding methods or to detect the presence of ragweed fungi, we found that in our territory we can consider them as vectors of ophiostomatic diseases and also as the transmission of other fungal diseases, which can either weaken or kill the host tree. We could consider the most successful method of breeding black shredder for laboratory purposes to be the method of breeding on nutrient medium, in which the fungal infection, which was introduced by insect insects introduced there, can be sufficiently spread.